Heat-regulating apparatus.



N. E. NASH.

BAT REGULATING APPARATUS.

APPLICATION FILED JUNE 23, 1911.`

Patented May 6, 1913.

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HEAT REGULATING APPARATUS.

APPLICATION FILED JUNE 23, 1911.

Patented May 6, 1913.

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NATHAN E. NASH, OF TORONTO, ONTARIO, CANADA.

HEAT-REGULATING APPARATUS.

Specification of Letters Patent.

Patented May 6, 1913.

Application iled June 23, 1911. Serial No. 635,034.

a radiator, at a regular and predeterminedl temperature; and it consists in an improved apparatus whereby air under pressure is used to control the opening'and closing of a valve in the steam pipe whereby the water in the tank is heated, the operation of the said apparatus being effected by a change of temperature of the water, as will hereinafter.

fully appear.

companying drawings, forming a part vhereof, and in which,- v

Figure 1 is a'partly sectional side view of the improved apparatus. Fig. 2 is a plan of the same with certain parts thereof removed. Fig. 3 is a planof a part of Fig. 1. Fig. 4 is a section taken on the dotted line w-m in Fig. 2. Y e

Referring now to the drawings, 1 'is `the body of the apparatus adapt-ed to be placed vover a tank. containing hot water to be supplied to a radiator for heating purposes. A portion of the upper wall of the said tank is represented by 2 in Fig. 1, as is also a hollow supporting stud 3 which at one end is screwed into the body 1, and at the other end screwed into the wall of the tank. The lower end of the stud 3 is interiorly threaded, and into it is screwed a'thermostatic tube 5 which extends into the water in the tank, and is closed at its lower end by a cap 7. At its upper end, the-thermostatic tube is in v communication with `the outer air by means of the central aperture in the stud 3, a

shown in Fig. 1.

9 and 10 are chambers situated sideby side in the body 1 as shown in Figs. 1, 3 and 4;

' and 12 and 13 are nozzles screwed into the body, and in communication with the said chambers, by means ofthe passages a and b respectively. The nozzles 12 and 13 lead respectively to a source of supply of air under pressure, and to suitable valve controlling mechanism whereby steam is ad mit-ted to a pipe within the tank 2 to heat the water therein, as hereinafter more fully described. The chambers 9 and 10 inter-' communicate by means of the channels c and l and they are in communication with a third chamber 15 (see Figs. 3 and 4) formed in a block 16 which is fastened bylmeans of screws shown in Figs. 2, 3 and 4, to the body 1. Into the upper end of the chamber 15 is screwed a plug 11 having a central air-escape aperture 17; and at the lower end of the aperture, 17, and at the upper end of the channel c areformed the valve seats e and f, respectively.

19 is a continuously open duct leading from the channel c at a point which is below the valve face f, to a valve chest 2O formed in the block 16, which is fitted with a screw plug 22 having a central aperture 23 leading to the outer air.

21 is a plug which extends transversely through the block 16 and across the duct 19; and at the point where it intersects the said duct, it is iattened to produce a device similar to a cock key which can be turned to reduce the transverse area of the duct at that place. Within the chamber 15 is a spherical valve 24 adapted to seat on either of the valve faces e or f; and its stem g extends loosely through the aperture 17 and is pivoted at its upper end to a rocker 25 hereinafter described. Placed loosely in the aperture 23 in the screw plug 22, vis a stem 27 having at its lower end a collar which is inoperative except that it serves to prevent withdrawal of the stem entirely from the plug; and upon this stem and directly over the said plug, is a valve 29 adapted to close the annular aperture 23 around the stem 27 under circumstances hereinafter described. The upper end of the stem 27 is provided with a head upon which rests the adjusting screw 30 at the end of the curved spring blade 31 which is attached to the block 1 and under tension in such direction as tc normally hold the valve 29 away from thx plug 22 and so disclose the central annulaaperture 23 therein.

`33 is a diaphragm chamber formed in diaphragm chamber is in communication with the valve chest by means of the `angular channel j; and supported by the d1aphragm 37, is a disk 39 having-a boss on its upper side which is in contact with the rocket before referred to and which` is pivoted to the columns 40 forming parts of the ring 36. The longarm of the rocker 25 is pivoted to the head of thevalve stem g as before stated, and its short a-rm is yieldingly held in an upward position by a spring 42 the upper end of which rests in a recess in the rocker, and its lower end in a similar recess in the ring 36.

43 is a bar with its lower end screwed into the-cap 7, and its upper end extending above the hollow st-ud 3 where it is in contact with an adjusting screw 45 .in a threaded sleeve c forming a part of an offset spring 47 which is held to the body -1 by the screws m. The outer or free end of the offset spring 47 is provided with a finger n which bears on the up er surface of the curved. spring 31 with sucient pressure Vto overcome .the tendency of the curved spring to rise. The nozzles I2 and 13 as before stated are respectively connected by means of pipes to a reservoir of compressed air, and to the upper side of a diaphra forming a part of a valve mechanism w ich controls the passage of steam to a pipe (not shown) situated in the tank 2 to heat the water therein. The said valve is closed bythe pressure of compressed air on the diaphragm, and opened by means of aspring when the compressed air escapes.

p The construction of this valve mechanism is well known, and as it 4forms-no part of the present invention, its illustration is omitted from the drawings; and for the purpose of perspicuity in the description of vthe operation of the apparatus, which follows, the said valve will be referred to as X.

50 is a casing which incloses the apparatus but does not insulate it from the outer air;

and it is shown in Fi 1 as erected on a plate 52 which is hel to the body l by means of the nut 53 on the threaded 4stud 3.

The operation of the apparatus is as follows: In Fig. 1, the various elements of the pansion of the thermostatic tube 5'wi1l cause,

the upper end of the bar 43 to descend together with the adjusting screw 45h; and in view of the free end'ofthe sprin 47 having at all times a tendency to see a lower level, the finger n bears on the curved spring 31 and after overcoming its resistance, forces it down, ,and the screw 30, through the agency of the stem 27, causes the valve 29 to seat on the screw plug 22 and close the aperture 23 therein. The escape of compressed air which reaches the said aperture by way of the constantly open channel' 19 having the area-reducing key 21 therein, is now prevented, and the-air accumulates under the diaphragm 36 which is thereby raised carrying with it the disk 39 whichlifts the long, arm ofthe rocker 25, and

through the medium of the stem g transfers the sphericalvalve 29 from its seat f to. the upper seat e. This4 movement ofthe valve 29 has the eiect of closingl the annular air escape aperture 17 around the stem g, and allows the compressed lair to pass through the channel Ac into the valve chamber 20, and thence through the cjhannelA al to the chest 10 which is in communication with the nozzle 13 by means of the passage b, and thence tothe-space above the diaphragm of the steam valve X, which is closed and remains closed until the water i in the tank falls below the predetermined minimum temperature; When-this takes place, the thermostatic tube 5 will have con-` vhollow stud which is inserted through the shell of the tank, a body fastened tothe said' stud having a pair of nozzles one of which leads to a source of air under pressure, and the other to a steam-valve-operating device adapted to govern the temperature ofthe water in the tank, the said body having a pair of intercommunicating chambers open to the said nozzles, a third chamber in communication with theothers, a `valve chest at all times open to intercommunicatin chambers by means of a duct and provide with an aperture leading to the outer air, 'and a valve to control the said aperture, a valve in ,the third chamber to close or .open communication vbetween the said nozzles, and at times admit of the escape of air from the nozzle leading to the steam-valveoperating device, a flexible diaphragm with its under side constantl open to the valve chest, a trunnioned rocker actuated by the said diaphragm to open and close the,valve in the third chamber, a thermostatic tube closed at the bottom, and at the top screwed Valve n the valve chest to .control the pasnto the hollowl stud and open to the air, a sage of air from below the diaphragm to the bar having its lower end fastened to t'ne outer air, substantially as specified.

bottom of the thermostato tube= and means NATHAN E. NASH. 5 whereby the movement of the said bar pro- Witnesses:

duced by a change in the temperature of the WM. TETON GORDON,

water in the tank is transmitted to the JOHN J. MENGES. 

